Geography · Climatology

Which of the following best explains why coastal upwelling is suppressed along the South American coast during an El Niño event?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1A strengthened Walker circulation traps cold water at deeper levels.
2Cooling of the eastern Pacific increases surface water density.
3Eastward movement of warm surface water deepens the thermocline and inhibits the rise of cold water along South America.✓
4Stronger trade winds deepen the thermocline in the western Pacific.

Correct answer

Eastward movement of warm surface water deepens the thermocline and inhibits the rise of cold water along South America.

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